354     float len = length(left->xyz);  in rsExtractFrustumPlanes()
356     len = length(right->xyz);  in rsExtractFrustumPlanes()
358     len = length(top->xyz);  in rsExtractFrustumPlanes()
360     len = length(bottom->xyz);  in rsExtractFrustumPlanes()
362     len = length(near->xyz);  in rsExtractFrustumPlanes()
364     len = length(far->xyz);  in rsExtractFrustumPlanes()
371     float distToCenter = dot(left->xyz, sphere->xyz) + left->w;  in rsIsSphereInFrustum()
375     distToCenter = dot(right->xyz, sphere->xyz) + right->w;  in rsIsSphereInFrustum()
379     distToCenter = dot(top->xyz, sphere->xyz) + top->w;  in rsIsSphereInFrustum()
383     distToCenter = dot(bottom->xyz, sphere->xyz) + bottom->w;  in rsIsSphereInFrustum()
387     distToCenter = dot(near->xyz, sphere->xyz) + near->w;  in rsIsSphereInFrustum()
391     distToCenter = dot(far->xyz, sphere->xyz) + far->w;  in rsIsSphereInFrustum()